<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区 -->
    <el-card>
      <!-- 搜索区域 -->
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodsList">
            <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="goAddPaga">添加商品</el-button>
        </el-col>
      </el-row>

      <!-- 列表区域 -->
      <el-table :data="goodsList" border stripe>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="商品名称" prop="goods_name"></el-table-column>
        <el-table-column label="商品价格(元)" prop="goods_price" width="95px"></el-table-column>
        <el-table-column label="商品重量" prop="goods_weight" width="70px"></el-table-column>
        <el-table-column label="创建时间" prop="add_time" width="140px">
          <template slot-scope="scope">
            {{scope.row.add_time | dateFormat}}
          </template>
        </el-table-column>
        <el-table-column label="操作" width="130px">
          <template slot-scope="scope">
                <el-button size="mini" type="primary" icon="el-icon-edit"></el-button>
                <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeGoodsById(scope.row.goods_id)"></el-button>
              </template>
        </el-table-column>
      </el-table>

      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[5, 10, 15, 20]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
        background>
      </el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 获取商品列表的查询参数
      queryInfo: {
        // 查询参数
        query: '',
        // 页码
        pagenum: 1,
        // 数据条数
        pagesize: 10
      },
      // 所有商品列表
      goodsList: [],
      // 商品总数
      total: 0
    }
  },
  created() {
    // 获取所有商品列表
    this.getGoodsList()
  },
  methods: {
    // 获取商品列表数据
    async getGoodsList() {
      const { data: res } = await this.$http.get('goods', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) return this.$message.error('商品列表数据获取失败')
      console.log(res.data)
      this.goodsList = res.data.goods
      this.total = res.data.total
    },
    // 监听数据条数变化
    handleSizeChange(newSize) {
      // 修改查询参数
      this.queryInfo.pagesize = newSize
      // 重新获取数据
      this.getGoodsList()
    },
    // 监听当前页码变化
    handleCurrentChange(newNum) {
      // 修改查询参数
      this.queryInfo.pagenum = newNum
      this.getGoodsList()
    },
    // 删除商品
    async removeGoodsById(id) {
      const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') return this.$message.info('已取消删除商品')
      // 删除商品
      const { data: res } = await this.$http.delete(`goods/${id}`)
      if (res.meta.status !== 200) return this.$message.error('删除商品失败!')
      this.$message.success('删除商品成功!')
      this.getGoodsList()
    },
    // 点击添加按钮跳转到添加商品页面
    goAddPaga() {
      // 编程方式实现页面跳转
      this.$router.push('/goods/add')
    }
  }
}
</script>

<style lang="less" scoped>
</style>
